Piping Length: Vrv Dx Only - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

5 Preparation
5.3.5

Piping length: VRV DX only

For system only containing VRV DX indoor units:
System setup
Example
Example 1.1
a b c d e f g
A B C D E F
h i j k l m
1 2 3 4 5 6
Example 1.2
i
a
A
b
H1
c d e f g
1 2 3 4 5
Example 1.3
a
b c d e f g h
1 2 3 4 5 6 7
H2
Example 2.1
r s
t
u
a b c d e f g
A B C D E F
h i j k l m
1 2 3 4 5 6
Example 2.2
H3
t
r
s
u a
A
b
c d e f g h
1 2 3 4 5 6
Example 2.3
H3
r t
s
u
a
b c d e f g h
1 2 3 4 5 6 7
H2
Example 3
r s t
u
Indoor unit
Refnet joint
Refnet header
Outdoor multi connection piping kit
Maximum allowable length
▪ Between outdoor and indoor units (single/multi combinations)
Installer and user reference guide
16
Description
Single outdoor
Branch with refnet joint
H1
G
p
n
7
8
H2
Single outdoor
Branch with refnet joint
and refnet header
B
k
j
7 8
H2
h
6
Single outdoor
Branch with refnet
header
H1
i
8
Multi outdoor
Branch with refnet joint
H1
G
p
n
7
8
H2
Multi outdoor
Branch with refnet joint
and refnet header
H1
B
j k
7 8
H2
Multi outdoor
Branch with refnet
header
H1
i
8
With standard multi
layout
Actual piping 165 m/135 m
length
Example 1.1
▪ unit 8: a+b+c+d+e+f+g+p≤165 m
Example 1.2
▪ unit 6: a+b+h≤165 m
▪ unit 8: a+i+k≤165 m
Example 1.3
▪ unit 8: a+i≤165 m
Example 2.1
▪ unit 8: a+b+c+d+e+f+g+p≤135 m
Equivalent length 190 m/160 m
Total piping 1000 m/500 m
length
Example 1.1
▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤1000 m
Example 2.1
▪ a+b+c+d+e+f+g+h+i+j+k+l+m+n+p≤500 m
▪ Between outdoor branch and outdoor unit (only in case of a multi
outdoor installation)
Actual piping 10 m
length
Example 3
▪ r, s, t≤10 m; u≤5 m
Equivalent length 13 m
Maximum allowable height difference
H1 ≤50 m (40 m) (if outdoor is located below indoor units)
Conditional extension up till 90 m is possible without
additional option kit:
▪ In case the outdoor location is higher than indoor:
extension is possible up till 90 m and following
2 conditions must be fulfilled:
▪ Liquid piping size up (see table "Size up" in
between refrigerant branch kit and indoor unit" on
page 14).
▪ Dedicated setting on outdoor unit is required (see [2‑49]
in "7.2.8 Mode 2: Field settings" on
▪ In case the outdoor location is lower than indoor:
extension is possible up till 90 m and following
6 conditions must be fulfilled:
▪ 40~60 m: minimum connection ratio connected: 80%.
▪ 60~65 m: minimum connection ratio connected: 90%.
▪ 65~80 m: minimum connection ratio connected: 100%.
▪ 80~90 m: minimum connection ratio connected: 110%.
▪ Liquid piping size up (see table "Size up" in
between refrigerant branch kit and indoor unit" on
page 14).
▪ Dedicated setting on outdoor unit is required (see [2‑35]
in "7.2.8 Mode 2: Field settings" on
H2 ≤30 m
H3 ≤5 m
Maximum allowable length after branch
The pipe length from the first refrigerant branch kit to the indoor unit
≤40 m.
Example 1.1: unit 8: b+c+d+e+f+g+p≤40 m
Example 1.2: unit 6: b+h≤40 m, unit 8: i+k≤40 m
"E: Piping
page 40).
"E: Piping
page 40).
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09